Update dependency prettier to v2.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
prettier (source)	devDependencies	minor	2.0.5 -> 2.1.1

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Release Notes

prettier/prettier

### [`v2.1.1`](https://togithub.com/prettier/prettier/blob/master/CHANGELOG.md#​211) [Compare Source](https://togithub.com/prettier/prettier/compare/2.1.0...2.1.1) [diff](https://togithub.com/prettier/prettier/compare/2.1.0...2.1.1) ##### Fix format on html with frontMatter ([#​9043](https://togithub.com/prettier/prettier/pull/9043) by [@​fisker](https://togithub.com/fisker)) ```html --- layout: foo --- Test abc. TypeError: Cannot read property 'end' of undefined ... --- layout: foo --- Test abc. ``` ##### Fix broken format for `...infer T` ([#​9044](https://togithub.com/prettier/prettier/pull/9044) by [@​fisker](https://togithub.com/fisker)) ```typescript // Input type Tail = T extends [infer U, ...infer R] ? R : never; // Prettier stable type Tail = T extends [infer U, ...(infer R)] ? R : never; // Prettier master type Tail = T extends [infer U, ...infer R] ? R : never; ``` ##### Fix format on `style[lang="sass"]` ([#​9051](https://togithub.com/prettier/prettier/pull/9051) by [@​fisker](https://togithub.com/fisker)) ```jsx ``` ##### Fix self-closing blocks and blocks with `src` attribute format ([#​9052](https://togithub.com/prettier/prettier/pull/9052), [#​9055](https://togithub.com/prettier/prettier/pull/9055) by [@​fisker](https://togithub.com/fisker)) ```vue ``` ### [`v2.1.0`](https://togithub.com/prettier/prettier/blob/master/CHANGELOG.md#​210) [Compare Source](https://togithub.com/prettier/prettier/compare/2.0.5...2.1.0) [diff](https://togithub.com/prettier/prettier/compare/2.0.5...2.1.0) 🔗 [Release Notes](https://prettier.io/blog/2020/08/24/2.1.0.html)

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